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https://github.com/fofolee/uTools-Manuals.git
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99 lines
5.5 KiB
HTML
99 lines
5.5 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>bzip2 文件二进制安全地读取</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.bzread" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">bzread</h1>
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<p class="verinfo">(PHP 4 >= 4.0.4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">bzread</span> — <span class="dc-title">bzip2 文件二进制安全地读取</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.bzread-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>bzread</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$bz</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$length</code><span class="initializer"> = 1024</span></span>
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] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>bzread()</strong></span> 从指定的 bzip2 文件指针中读取数据。
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</p>
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<p class="para">
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读取到 <code class="parameter">length</code>（未经压缩的长度）个字节，或者到文件尾，取决于先到哪个。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.bzread-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">bz</code></dt>
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<dd>
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<p class="para">
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文件指针。它必须是有效的并且指向 <span class="function"><a href="bzopen.html" class="function">bzopen()</a></span> 成功打开的文件。
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</p>
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</dd>
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<dt>
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<code class="parameter">length</code></dt>
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<dd>
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<p class="para">
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如果没有提供， <span class="function"><strong>bzread()</strong></span> 一次会读入 1024 个字节（未经压缩的长度）。
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一次最大可读入 8192 个未压缩的字节。
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.bzread-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回解压的数据，在错误时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.bzread-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-700">
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<p><strong>Example #1 <span class="function"><strong>bzread()</strong></span> 范例</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /><br />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">"/tmp/foo.bz2"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$bz </span><span style="color: #007700">= </span><span style="color: #0000BB">bzopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">, </span><span style="color: #DD0000">"r"</span><span style="color: #007700">) or die(</span><span style="color: #DD0000">"Couldn't open </span><span style="color: #0000BB">$file</span><span style="color: #DD0000">"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$decompressed_file </span><span style="color: #007700">= </span><span style="color: #DD0000">''</span><span style="color: #007700">;<br />while (!</span><span style="color: #0000BB">feof</span><span style="color: #007700">(</span><span style="color: #0000BB">$bz</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">$decompressed_file </span><span style="color: #007700">.= </span><span style="color: #0000BB">bzread</span><span style="color: #007700">(</span><span style="color: #0000BB">$bz</span><span style="color: #007700">, </span><span style="color: #0000BB">4096</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">bzclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$bz</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"The contents of </span><span style="color: #0000BB">$file</span><span style="color: #DD0000"> are: <br />\n"</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">$decompressed_file</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.bzread-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="bzwrite.html" class="function" rel="rdfs-seeAlso">bzwrite()</a> - 二进制安全地写入 bzip2 文件</span></li>
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<li class="member"><span class="function"><a href="feof.html" class="function" rel="rdfs-seeAlso">feof()</a> - 测试文件指针是否到了文件结束的位置</span></li>
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<li class="member"><span class="function"><a href="bzopen.html" class="function" rel="rdfs-seeAlso">bzopen()</a> - 打开 bzip2 压缩文件</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |